Total population Total population Total population Symptomatic infection Symptomatic infection Symptomatic infection
Influenza (n=295) SARS-CoV2 (n=133) p value† Influenza (n=293) SARS-CoV2 (n=103) p value†
PICU admission 55 (18.6%) 45 (33.8%) 0.001 54 (18.4%) 34 (33%) 0.004
Non-invasive mechanical ventilation 127 (43%) 12 (9%) <0.001 126 (43%) 10 (9.7%) <0.001
Invasive mechanical ventilation 67 (22.7%) 27 (20.3%) 0.62 67 (22.9%) 22 (21.4%) 0.79
High-frequency oscillatory ventilation 12 (4.1%) 3 (2.3%) 0.41 12 (4.1%) 2 (1.9%) 0.53
Severe ARDS (PaO2/FiO2 index <100) 19 (6.4%) 3 (2.3%) 0.096 19 (6.4%) 3 (2.9%) 0.01
Death 19 (6.4%) 10 (7.5%) 0.68 19 (6.5%) 9 (8.7%) 0.50